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The Virtual Textbook
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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
The Six Card Puzzle
This excel file deals with the puzzle where a number between 1 and 63 is chosen. That number can be seen on some of a set of six cards. The number can easily be calculated by looking at the cards containing that number. This puzzle is based on binary numbers and the fact that any number can be uniquely expressed as the sum of powers of 2. The six cards are shown on the first sheet then there is a set of blank cards for students to complete once they have discovered the pattern. The last two sheets show the binary form of numbers up to 35.
Note This program was designed by be viewed on a screen with a resolution of 1024 x 768. Users may have to adjust the resolution of their screen for the pages to display as was originally intended. The program uses macros which need to be enabled on users’ machine.
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The six card puzzle 771.5 KB
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The six card puzzle 771.5 KB
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